LEriDOrTERA. 249 



proportion, they consume great quantities of leaves; and the 

 lonw leafless branches of the vine too often afford evidence of 

 their voracity. They also devour the leaves of the coniinon 

 creeper [Ampelopsis quinquefolia), which, with those of our 

 indigenous vines, were their only food till the introduction and 

 increased cultivation of foreign vines afforded them an addi- 

 tional supply. They come to their growth during the month 

 of August, enter the earth to transform, and appear in the 

 winged or moth state the following summer in June and July. 

 The SateUitia Hawk-moth expands from four to five inches, is 

 of a light olive color, variegated with patches of darker olive. 

 The Acheinon expands from three to four inches, is of a reddish 

 ash-color, with two triangular patches of deep brown on the 

 thorax, and two square ones on each fore wing; the hind wings 

 are pink, with a deeper red spot near the middle, and a broad 

 ash-colored border behind. 



The grape-vine suffers still more severely from the ravages 

 of another kind of Sphinx caterpillars, smaller in size than 

 the preceding, and like them solitary in their habits, but more 

 numerous, and, not content with eating the leaves alone, in 

 their progress from leaf to leaf down the stem, they stop at 

 every cluster of fruit, and, either from stupidity or disappoint- 

 ment, nip off the stalks of the half-grown grapes, and allow 

 them to fall to the ground untasted. I have gathered under 

 a single vine above a quart of unripe grapes thus detached 

 during one night by these caterpillars. They are naked and 

 fleshy like those of the Achemon and SateUitia, and are gener- 

 ally of a pale green color (sometimes, however, brown), with 

 a row of orange-colored spots on the top of the back, six or 

 seven oblique darker green or brown lines on each side, and 

 a short spine or horn on the hinder extremity. The head is 

 very small, and, with the fore part of the body, is somewhat 

 retractile, but not so completely as in the two jjreceding spe- 

 cies. The fourth and fifth segments being very large and 

 swollen, while the three anterior segments taper abruptly to 

 the head, the fore part of the body presents a resemblance to 

 the head and snout of a hog. This suggested the generical 

 name of Cha^rocampa, or hog-caterpillar, which has been ap- 

 32 



